Piston ring



1,471,700 F. M. MOORE PISTON RING Oct. 23 1923.

Filed May 29. 1922 INVENTQR. Fined M Moore BYQ3 T T ORNEY atented Get. 23, 1 923;

an STATES.

ram) 1r. moons, orsecnmmg'ro, CALIFORNIA.

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Application filed May 29,

To all whom it may concern:

Be it known that 1, Fame M. Moonn, a citizen of the United States, -residing at Sacramento, county of Sacramento, State 5 of, California, have invented certain new and useful Improvements in'Piston Rings; and I do declare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of this application. I K

This invention relates to improvements in piston rings such as are used in the pistons of gas engines, and is particularly an improvement over that type of ring shown in mv oopending application for patent filed MayQ-ith 1922, Serial No.563,234.

The principal object of the present invention is to produce a ringof the general type shown in the above mentioned'appli-. cation, that is, a float-ingand oil collecting ring which does not depend upon frictional contact with the cylinder walls to maintain a gas tight seal therewith, which will be more efficient in operationthan the first shown type, will not wear the ring grooves, and is much stronger without any increase in cross sectional area of the'ring.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly efiective for the purposes for. which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appearby a perusal of the following specification and claims.

In the drawings similar characters of referenceindicate corresponding parts in the several views Fig. 1 is a perspective view of the ring.

Fig 2 is an enlarged cross section of the ring showing the same as mounted in its oove in a piston.

Referring now more particularly to the characters of reference on the drawings. the numeral 1 denotes the ring in general, of even thickness throughout, and preferably having its out ends adapted to overlap horizontally as at 2.

Cut in the outer face of the ring, near the top is a continuous V-shaped groove 3, while out in the lower face of the ring is another continuous V-shaped unimpaired.

groove 4,

1922. Serial No. 564,821.

whose inner side extends parallel to the inner face of the ring-and lies in a plane about midway of the width of the ring, and

i whose opposite side extends at an angle to meet the lower and outer edge of the ring.

Curve-d slots 5, eccentric with the ringcircle, are out at spaced intervals in the inner face of the ring, in vertical lalinement with the groove 4 but above the lower face of the ring somewhat, so that said lower face is not cut into transversely, but retains a smooth and continuous surface. These slots or grooves 5 melt into the inner face of the ring at their ends, but centrally oftheir extent are of such a depth as to cut through the inner face of the groove 4 and thus communicate with said groove.

This ring is preferably in the upper end of the piston 6, the latter having holes 7 leading from the interior of the piston to the groove 8 therein in which the ring seats.

' Inoperation, this ring functions in the same manner as the ring as set forth in the above mentioned copending application. That is, as the piston descends, the groove 4 collects most of the oil previously thrown against the cylinder walls from the crank case of the motor., With the ascent of the piston, a tendency to vacuum is created in the crank case, which causes the oil in the groove 4 to be sucked therefrom, through the slots 5 and holes 7, into the interior of the piston, and thence back into the crank case with its body and lubricating qualities 7 The ,ring is not definitely fixed in its i groove, but floats, and with the oscillation of the pistons, constantly rotates. It is therefore not pomible to maintain the holes 7 constantly in radial alinement with the slots 5, nor is this necessary, since the inner face of the ring is never snug against the back of the piston groove 8, and conse quently a communicating space is always had between the holes 7 and slots 5.

. By reason of the under face of the ring having a ontinuous and unbroken surface, the rotation of the ring will not wear the lower face of the piston groove which I have found to be a serious defect with the -original ring in which radial slots or "grooves were cut upwardly from the lower face of the ring. leaving sharp edges which produced a cutting effect on the lower face of the lowermost one,

the piston groove due to the rotation of the defects I have eliminated with. the construction of the ring shown and-described in the present application. X

From the foregoing description it will be readily device as substantially fu fills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departurefrom the spirit of the invention, as defined by the appended claims.

Having thus described my invention, what seen that I have produced such a- I claim as new and useful and desire to secure by Letters Patent is:

1. In a piston ring, a groove cut in the lower face thereof and positioned with respect to the outer periphery of the ring to collect oil from the wall of the cylinder in which the piston moves, and arcuate grooves cut eccentric with the ring circle from the inner face of the ring intermediate the upper and lower faces thereof to meet and intersect the first named groove.

2. In a piston ring, a continuous groove cut in the lower face of the ring and extending upwardly and inwardly from the lower and outer edge thereof and spaced grooves cut in the inner face of the ring above the lower face thereof to communicate with the continuous groove, said second named grooves being longer at their inner'ends than at their junction with saidcontinuous groove,

In testimony/whereof I affix my signature.

FRED M. MOORE. 

